package lab02.Test36;

/**
 * Created by 李晓容 on 2017/11/9.
 */
public class Postgraduate extends Student {

    @Override
    String calGrade() {
        //得到该生的平均成绩
        double avg=calAverage();
        if (avg>90&&avg<=100)
            grade="优秀";
        else if (avg>=80&&avg<90)
            grade="良好";
        else if (avg>=70&&avg<80)
            grade="一般";
        else if (avg>=60&&avg<70)
            grade="及格";
        else if (avg<60)
            grade="不及格";
        return grade;


    }
}
